Guard-plate for boilers



A.- ONEILL.'

Guard Plate for Boilers.

PatentedFeb. 20, '1866; l

rricn.

ANDREW ONEILL, OF PORTSMOUTH, OHIO.

GUARD-PLATE FOR BOILERS.

Specification forming part of Letters Patent No. 52,@06, dated February20, 1866.

To all whom it may concern:

Be it known that I, ANDREW ONEILL, of Portsmouth, Scioto county, Ohio,have invented a new and useful Guard-Plate for Sheet- MetalBoiling-Vessels; and I do hereby declare the following to be a full,clear, and exact description thereof, reference being had to theaccompanying drawings, making part of this specication.

My invention relates to the provision of a cast-iron shield orguard-plate, adapted to be fastened beneath the bottom or pit of asheetmetal boiling-vessel for the several purposes ofprotectin g saidbottom from becomingdented and battered either from without or fromwithin, and of holding said bottom to its flat or plane form, and ot'enabling the vessel always to stand square and plumb, and of preventingthe soiling or smu'tting of a table or other surface upon which thevessel may be set.'

A represents a casting, which I call the guard-plate, having the form ofa flat-bottomed shallow pan, having a rim or marginal elevation, B, feetUand numerous openings or apertures, D, to afford access of the lire tothe bottom, as well as to lighten the plate and give it a more pleasingappearance.

Slots E receive rivets F by which the guardplate is secured to thebottom, the said slots heilig so much larger than the shanks of therivets as to permit the expansion and contraction of the bottom and ofthe guard-plate independently of each other. The inner ends of therivets F are covered by solder G.

The feet (l enable the vessel at all times to stand firmly withoutrocking or wabbling, and without smutting up ofthe stove-top, or table,or floor, or other object upon which it may be set. They also enable thevessel to be set clear of the flame or of the hot plates of thestove-top, so as to simmer for any length of time without scorching sucharticles as sirup, apple-butter, milk, Sto. A

My guard prevents the denting and battering of the bottom from below byprojecting' `points of coal or other fuel in the fire-box, and

as effectually preserves the bottom from the same class of injury fromstirring-sticks or other implements employed within the boiler. It alsoprevents the sagging or bellying down of the bottom when lifted in afull condition. The bottom, being preserved equally from indentations,inducing oxidation, and from salient points liable to excessive wear,may be of lighter material andv yet outlast those not thus protected. Myguard also preserves the bot-tom from being indented and even pierced byprojecting angles of fuel, as well as by pebbles, nail-heads, te., oniioors and other places.

The .casting-A may be rendered malleable in the customary way.

I claim herein as new and of my invention-- l. A cast-metal guard-plateor shield for attachment to the bottoms of boilers, either with orwithout the openings, feet, or marginal ange, substantially as describedand represented.

2. The .cast-metal guard-plate, in combination with the feet C, for thepurpose described.

3. Incombination,withtl'lecast-metalguardpla-te, the rim or marginalelevation B, em bracing the shoulder ofthe pit or drop, of a sheetmetalboiling-vessel.

4. In combination with the guard-plate, the slot E for the passage ofthe rivets in case oi' the unequal expansion of the vessel and plate.

In testimony of which invention I hereunto set my hand.

ANDREW ONEILL.

Witnesses:

GEO. H. KNIGHT, JAMES H. LAYMAN.

